package study.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import study.reggie.common.CustomException;
import study.reggie.dao.CategoryDao;
import study.reggie.pojo.Category;
import study.reggie.pojo.Dish;
import study.reggie.pojo.Setmeal;
import study.reggie.service.CategoryService;
import study.reggie.service.DishService;
import study.reggie.service.SetmealService;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    /*
    * 删除之前先判断分类是否关联菜品，再根据id删除分类
    * */
    @Override
    public void remove(Long id) {
        //查询当前分类是否关联了菜品,如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper=new LambdaQueryWrapper<>();
        //添加查询条件，根据id进行分类查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishLambdaQueryWrapper);
        if(count1 > 0){
            //已经关联菜品，抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品，无法删除！");
        }

        //查询当前分类是否关联了套餐,如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper=new LambdaQueryWrapper<>();
        //添加查询条件，根据id进行分类查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        if(count2 > 0){
            //已经关联了套餐，抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐，无法删除！");
        }

        //正常删除分类
        super.removeById(id);

    }
}
